package com.aree.caipiao.dao.hibernate;

import java.io.Serializable;
import java.lang.reflect.ParameterizedType;
import java.sql.SQLException;
import java.util.Collection;
import java.util.List;

import javax.annotation.Resource;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Projections;
import org.springframework.dao.DataAccessException;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.aree.caipiao.dao.IGenericDao;
import com.aree.caipiao.model.IdEntity;
import com.aree.caipiao.model.PaginationSupport;

public class GenericDao<T extends IdEntity, ID extends Serializable> extends
		HibernateDaoSupport implements IGenericDao<T, ID> {
	private Log logger = LogFactory.getLog(getClass());

	protected Class<T> entityClass;

	public GenericDao() {

	}

	@Resource
	public void setSessionFactoryOverride(SessionFactory sessionFactory) {
		super.setSessionFactory(sessionFactory);
	}

	@SuppressWarnings("unchecked")
	protected Class<?> getEntityClass() {
		if (entityClass == null) {
			entityClass = (Class<T>) ((ParameterizedType) getClass()
					.getGenericSuperclass()).getActualTypeArguments()[0];
			logger.debug("T class = " + entityClass.getName());
		}
		return entityClass;
	}

	public void saveOrUpdate(T t) throws DataAccessException {
		this.getHibernateTemplate().saveOrUpdate(t);
	}

	public T load(ID id) throws DataAccessException {
		@SuppressWarnings("unchecked")
		T load = (T) getHibernateTemplate().load(getEntityClass(), id);
		return load;
	}

	@SuppressWarnings("unchecked")
	public T get(ID id) throws DataAccessException {
		T load = (T) getHibernateTemplate().get(getEntityClass(), id);
		return load;
	}

	public boolean contains(T t) throws DataAccessException {
		return getHibernateTemplate().contains(t);
	}

	public void delete(T t, LockMode lockMode) throws DataAccessException {
		getHibernateTemplate().delete(t, lockMode);
	}

	public void delete(T t) throws DataAccessException {
		getHibernateTemplate().delete(t);
	}

	public void deleteAll(Collection<T> entities) throws DataAccessException {
		getHibernateTemplate().deleteAll(entities);
	}

	@SuppressWarnings({ "unchecked", "cast" })
	public List<T> find(String queryString, Object value)
			throws DataAccessException {
		List<T> find = (List<T>) getHibernateTemplate()
				.find(queryString, value);
		return find;
	}

	@SuppressWarnings({ "unchecked", "cast" })
	public List<T> find(String queryString, Object[] values)
			throws DataAccessException {
		List<T> find = (List<T>) getHibernateTemplate().find(queryString,
				values);
		return find;
	}

	@SuppressWarnings({ "unchecked", "cast" })
	public List<T> find(String queryString) throws DataAccessException {
		return (List<T>) getHibernateTemplate().find(queryString);
	}

	public void refresh(T t, LockMode lockMode) throws DataAccessException {
		getHibernateTemplate().refresh(t, lockMode);
	}

	public void refresh(T t) throws DataAccessException {
		getHibernateTemplate().refresh(t);
	}

	public Serializable save(T t) throws DataAccessException {
		return getHibernateTemplate().save(t);
	}

	public void saveOrUpdateAll(Collection<T> entities)
			throws DataAccessException {
		getHibernateTemplate().saveOrUpdateAll(entities);
	}

	public void update(T t, LockMode lockMode) throws DataAccessException {
		getHibernateTemplate().update(t, lockMode);
	}

	public void update(T t) throws DataAccessException {
		getHibernateTemplate().update(t);
	}

	@SuppressWarnings("unchecked")
	public List<T> list() throws DataAccessException {
		return (List<T>) getHibernateTemplate().loadAll(getEntityClass());

	}

	@SuppressWarnings("unchecked")
	public List<T> findByNamedQuery(String queryName)
			throws DataAccessException {
		return getHibernateTemplate().findByNamedQuery(queryName);
	}

	@SuppressWarnings("unchecked")
	public List<T> findByNamedQuery(String queryName, Object value)
			throws DataAccessException {
		return getHibernateTemplate().findByNamedQuery(queryName, value);
	}

	@SuppressWarnings("unchecked")
	public List<T> findByNamedQuery(String queryName, Object[] values)
			throws DataAccessException {
		return getHibernateTemplate().findByNamedQuery(queryName, values);
	}

	@SuppressWarnings("unchecked")
	public T get(String id) throws DataAccessException {
		T load = (T) getHibernateTemplate().get(getEntityClass(), id);
		return load;
	}

	public void flush() {
		this.getHibernateTemplate().flush();
	}

	public void clear() {
		this.getHibernateTemplate().clear();
	}

	@SuppressWarnings({ "unchecked", "rawtypes" })
	public PaginationSupport<T> findPageByCriteria(
			final DetachedCriteria detachedCriteria, final int pageSize,
			final int startIndex) {
		return (PaginationSupport) getHibernateTemplate().execute(
				new HibernateCallback() {
					public Object doInHibernate(Session session)
							throws HibernateException {
						Criteria criteria = detachedCriteria
								.getExecutableCriteria(session);
						int totalCount = ((Long) criteria.setProjection(
								Projections.rowCount()).uniqueResult())
								.intValue();
						criteria.setProjection(null);
						List<?> items = criteria.setFirstResult(startIndex)
								.setMaxResults(pageSize).list();
						PaginationSupport ps = new PaginationSupport(items,
								totalCount, pageSize, startIndex);
						return ps;
					}
				});
	}

	@SuppressWarnings({ "unchecked", "rawtypes" })
	public PaginationSupport<T> findPageByQuery(final String hql,
			final String countHql, final Object obj, final int pageSize,
			final int startIndex) {
		return (PaginationSupport) getHibernateTemplate().execute(
				new HibernateCallback() {
					public Object doInHibernate(Session session)
							throws HibernateException, SQLException {
						Query query = session.createQuery(countHql);
						query.setParameter(0, obj);

						int totalCount = ((Long) query.iterate().next())
								.intValue();
						query = session.createQuery(hql);
						query.setParameter(0, obj);
						if (pageSize != -1) {
							query.setFirstResult(startIndex);
							query.setMaxResults(pageSize);
						}
						List<?> items = query.list();
						PaginationSupport ps = new PaginationSupport(items,
								totalCount, pageSize, startIndex);
						return ps;

					}
				});
	}

	@SuppressWarnings({ "unchecked", "rawtypes" })
	public PaginationSupport<T> findPageByQueryIn(final String hql,
			final String countHql, final Object obj, final int pageSize,
			final int startIndex, final String paraName) {
		return (PaginationSupport) getHibernateTemplate().execute(
				new HibernateCallback() {
					public Object doInHibernate(Session session)
							throws HibernateException, SQLException {
						Query query = session.createQuery(countHql);
						query.setParameterList(paraName, (List) obj);

						int totalCount = ((Long) query.iterate().next())
								.intValue();
						query = session.createQuery(hql);
						query.setParameterList(paraName, (List) obj);
						if (pageSize != -1) {
							query.setFirstResult(startIndex);
							query.setMaxResults(pageSize);
						}
						List<?> items = query.list();
						PaginationSupport ps = new PaginationSupport(items,
								totalCount, pageSize, startIndex);
						return ps;

					}
				});
	}

	@SuppressWarnings({ "unchecked", "rawtypes" })
	public PaginationSupport<T> findPageByQuery(final String hql,
			final String countHql, final Object[] obj, final int pageSize,
			final int startIndex) {
		return (PaginationSupport) getHibernateTemplate().execute(
				new HibernateCallback() {
					public Object doInHibernate(Session session)
							throws HibernateException, SQLException {
						Query query = session.createQuery(countHql);
						if (obj != null && obj.length > 0) {
							for (int i = 0; i < obj.length; i++) {

								query.setParameter(i, obj[i]);
							}
						}
						int totalCount = ((Long) query.iterate().next())
								.intValue();

						query = session.createQuery(hql);

						if (obj != null && obj.length > 0) {
							for (int i = 0; i < obj.length; i++) {
								query.setParameter(i, obj[i]);
							}
						}
						if (pageSize != -1) {
							query.setFirstResult(startIndex);
							query.setMaxResults(pageSize);
						}
						List<?> items = query.list();
						PaginationSupport ps = null;
						if (pageSize != -1) {
							ps = new PaginationSupport(items, totalCount,
									pageSize, startIndex);
						} else {
							ps = new PaginationSupport(items, totalCount,
									totalCount, startIndex);
						}

						return ps;

					}
				});
	}
}
